ethyl 3-[(1R)-1-phenylethyl]imidazole-4-carboxylate 3-[(1R)-1-phenylethyl]-4-imidazolecarboxylic acid ethyl ester 3-[(1R)-1-phenylethyl]imidazole-4-carboxylic acid ethyl ester ZINC00001408 R-16659 MLS000758268 SMR000466277 NCGC00025176-01 Tocris-1471 E6530_SIGMA R16659